A problem on compile Kerberos in Kubuntu9.04

[Guest]

Hello, guys. I'm new here and also a fan of KDE.Now I am struggling with my homework on Kerberos.
I'm stuck here------compling the source file.
At first, it shows that ncurse library not found.So I install it.And the ./configure just passed.
But when make it, all went well at first until it came to the end.
It shows like this:

yacc getdate.y
make[2]: yacc: Command not found
make[2]: *** [getdate.c] Error 127
make[2]: Leaving directory `/home/kevin/Documents/krb5-1.6.3/src/kadmin/cli'
make[1]: *** [all-recurse] Error 1
make[1]: Leaving directory `/home/kevin/Documents/krb5-1.6.3/src/kadmin'
make: *** [all-recurse] Error 1

How can I deal with it. I googled and found the solutions. install flex or bison.
Which one should I choose.
Is there anything else to install to complete the installation.
Any advice is welcome.

[Guest]

Re: A problem on compile Kerberos in Kubuntu9.04

Oh, I just install flex bison. And all goes well. I think I am a little on my nerve when using Kubuntu. I am always afraid of letting the system down.
I just
sudo apt-get install flex bison.